An axial flux machine has an annular stator and two rotor elements mounted rotatably relative to the stator about an axis of rotation. A first rotor element is arranged axially adjacent to a first end face of the stator and a second rotor element is arranged axially adjacent to a second end face of the stator. The stator has a plurality of stator cores, distributed in a circumferential direction of a circular line extending about the axis of rotation, wherein at least one stator core has a plurality of radially extending guide segments that are stacked on top of one another in the circumferential direction and are of plate-like design. At least a partial quantity of the guide segments have, on the radial outer side thereof and/or the radial inner side thereof, a retaining accommodated in an interlocking manner on at least one supporting region fixed to the housing.

An axial flux machine has an annular stator and two rotor elements mounted rotatably relative to the stator about an axis of rotation. A first rotor element is arranged axially adjacent to a first end face of the stator and a second rotor element is arranged axially adjacent to a second end face of the stator. The stator has a plurality of stator cores, distributed in a circumferential direction of a circular line extending about the axis of rotation, wherein at least one stator core has a plurality of radially extending guide segments that are stacked on top of one another in the circumferential direction and are of plate-like design. At least a partial quantity of the guide segments have, on the radial outer side thereof and/or the radial inner side thereof, a retaining accommodated in an interlocking manner on at least one supporting region fixed to the housing.

In a rotor core and a motor including the rotor core, a rotor yoke includes magnetic pole core groups arranged in a circumferential direction and each including a magnetic conductor at a center and permanent magnets around the magnetic conductor. A center of each magnetic pole core group is defined by the magnetic conductor, so that the number of magnets used can be reduced to achieve low cost. The permanent magnets around the magnetic conductor increases a magnetic flux concentration effect while preventing magnetic flux leakage to achieve high efficiency and high performance.

A variable axial flux motor (VAFL) includes: a stator; and a first rotor part. The stator is disposed next to the first rotor part, along a rotational axis of the VAFL. A pole of the first rotor part includes: a first hard magnet; a first soft magnet; and a first ferrous part.

A variable axial flux motor (VAFL) includes: a stator; and a first rotor part. The stator is disposed next to the first rotor part, along a rotational axis of the VAFL. A pole of the first rotor part includes: a first hard magnet; a first soft magnet; and a first ferrous part.

This disclosure relates generally to vehicles propulsion based on the use of natural gravitational forces and, in some instances, the use of electric motor control. In some examples, a spherical assembly includes a spherical encasing a first motor connected to a first weight, a second motor connected to a second weight, and a power generator configured to supply power to the first motor and to the second motor. The spherical assembly may also include a controller that is configured to cause the first motor to rotate the first weight in a first direction at a first rotational speed and the second motor to rotate the second weight in a second direction at a second rotational speed based on the rotational speed of the spherical assembly. The controller may also be configured to cause the power generator to generate power for the first motor and the second motor.

This disclosure relates generally to vehicles propulsion based on the use of natural gravitational forces and, in some instances, the use of electric motor control. In some examples, a spherical assembly includes a spherical encasing a first motor connected to a first weight, a second motor connected to a second weight, and a power generator configured to supply power to the first motor and to the second motor. The spherical assembly may also include a controller that is configured to cause the first motor to rotate the first weight in a first direction at a first rotational speed and the second motor to rotate the second weight in a second direction at a second rotational speed based on the rotational speed of the spherical assembly. The controller may also be configured to cause the power generator to generate power for the first motor and the second motor.

A dual-rotor in-wheel motor based on an axial magnetic field and a control method thereof are provided. The dual-rotor in-wheel motor includes an axle and a hub. The axle is fixedly connected to a frame. The hub relatively rotates around the axle. A disc-shaped intermediate stator is fixedly connected on the axle. A left coil assembly and a right coil assembly are fixedly mounted on two sides of the intermediate stator, respectively. A left rotor and a right rotor are respectively arranged on the two sides of the intermediate stator. The left coil assembly drives the left rotor to rotate, and the right coil assembly drives the right rotor to rotate. A left clutch is arranged between the left rotor and the hub, and a right clutch and a speed reduction mechanism are arranged between the right rotor and the hub.

A dual-rotor in-wheel motor based on an axial magnetic field and a control method thereof are provided. The dual-rotor in-wheel motor includes an axle and a hub. The axle is fixedly connected to a frame. The hub relatively rotates around the axle. A disc-shaped intermediate stator is fixedly connected on the axle. A left coil assembly and a right coil assembly are fixedly mounted on two sides of the intermediate stator, respectively. A left rotor and a right rotor are respectively arranged on the two sides of the intermediate stator. The left coil assembly drives the left rotor to rotate, and the right coil assembly drives the right rotor to rotate. A left clutch is arranged between the left rotor and the hub, and a right clutch and a speed reduction mechanism are arranged between the right rotor and the hub.

An electric motor includes a housing, a shaft, a rotor, a stator, and at least one coolant supply channel. The shaft is rotatably mounted within the housing and has a longitudinal axis. The rotor is fixed to the shaft for rotation therewith. The stator is spaced apart from the rotor along the longitudinal axis of the shaft to yield at least one air gap between the stator and the rotor. The at least one coolant supply channel extends through at least one of the shaft and the stator and is configured to supply coolant flow to the at least one air gap.